Exercise 1: Sampling Versus Tracing — Possible Solution
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TASK
Explain the difference between sampling and tracing, and say which one Time
Profiler uses and which kind of question each suits.

ANSWER
- Sampling: the tool looks at the CPU every few milliseconds to see what code
  is running.
- Tracing: the tool records every time a specific event, such as a memory
  allocation, occurs.
- Time Profiler samples: it captures the call stacks of running threads,
  typically at 1 ms intervals, and builds a statistical profile.

WHICH SUITS WHAT
- Sampling suits "where does the time go overall?" because a hot function
  shows up in many samples. It can miss something that runs only briefly
  between samples.
- Tracing suits "how often does this event happen?" because every event is
  recorded, at the cost of more overhead.

CHECK
The two definitions and the 1 ms figure come from the chapter's sources. The
suitability comments are my inference from those definitions.